196,357 research outputs found
A CONTRIBUTION OF PROFESSOR A.A. ZIGANSHIN TO THE DEVELOPMENT OF WINTER RYE CULTIVATION TECHNOLOGY
No full textThe article gives a brief overview of the researches of well-known scientist, plant breeder, Professor A.A. Ziganshin about the winter rye. The main content of his scientific research on winter rye cultivation technology is described. His contribution to the development of scientific research on the development of cultivation technology and to the training of scientists on winter rye is shown.</jats:p
Massive saccular aneurysm of the right sinus of Valsalva
No full textBrugada syndrome (BS) is an inherited disease characterized by a coved-type ST-segment elevation in the right precordial leads and increased risk of sudden cardiac death (SCD), in the absence of structural abnormalities. The cornerstone of BS diagnosis and definition, is its characteristic ECG pattern that can be present spontaneously or unmasked by drugs. Brugada syndrome was first described 25 years ago; paradoxically, in an era of great technological development, a new syndrome was described with a technology developed almost a century before. Great scientific knowledge has been gathered since the description of the syndrome. The better understanding of its pathophysiology and genetic basis has led to several modifications in its definition. Despite these facts, the essential, the description of the specific ECG pattern has remained almost unchanged since the initial report. In this article, we present the definition of the BS, the rationale behind it and our thoughts about its future
Fluoroquinolones and Aortic Diseases: Is There a Connection
No full textFluoroquinolones (FQs) are one of the most commonly prescribed classes of anti- biotics. Their high tissue distribution and broad-spectrum antibacterial coverage make their use very attractive in numerous infectious diseases. Although generally well tolerated, FQs have been associated with different adverse effects including dysgly- cemia and arrhythmias. FQs have been also associated with a series of adverse effects related to collagen degradation, such as Achilles tendon rupture and retinal detach- ment. Recently, an association between consumption of FQs and increased risk of aortic aneurysm and dissection has been proposed. This article reviews the pathogen- esis of thoracic aortic diseases, the molecular mechanism of FQ-associated collagen toxicity, and the possible contribution of FQs to aortic diseases
Smart Molecular Recognition: From Key-to-Lock Principle to Memory-Based Selectivity
No full text© Copyright © 2020 Gatiatulin, Ziganshin and Gorbatchuk. The formation and decomposition of inclusion compounds with a solid-solid phase transition may be very selective to the guest molecular structure. This selectivity may function in essentially different ways than defined by the classical concept of molecular recognition, which implies the preferential binding of complementary molecules. Solid inclusion compounds may take part as an initial or/and final state in several processes of different types summarized in this review, which selectivity is boosted by cooperativity of participating molecular crystals. Some of these processes resemble switching electronic devices and can be called smart giving practically absolute molecular recognition
Direct axillary cannulation with open Seldinger-guided technique: is it safe?
No full textOBJECTIVES: Axillary artery cannulation is commonly used in thoracic aortic surgery, often utilizing a sidearm graft. Although our institutional preference is femoral cannulation, we use axillary cannulation in select cases with a 'dirty' aorta on computed tomography scan or intraoperative transoesophageal echocardiography. Since 2011, we have routinely used an open Seldinger-guided approach for axillary cannulation. Here, we report our experience with open Seldinger-guided technique, evaluating its safety and efficacy. METHODS: A retrospective analysis of our institutional database from 2011 to 2016 was performed to find cases of peripheral arterial cannulation for thoracic aortic surgery. We identified 404 consecutive patients who underwent peripheral arterial cannulation. Of these, 352 were femoral and 52 were axillary cannulations. All axillary cannulations were performed for ascending and/or arch surgery. The technique involves a surgical exposure of the artery which is then cannulated by guidewire inside a purse string without arterial incision. RESULTS: Indications for surgery included aneurysm in 63.5% (33/52), dissection in 30.7% (16/52) and pseudoaneurysm in the remaining 5.8% (3/52). Hospital survival was 98.1% (51/52). There were no instances of axillary arterial injury or intraoperative malperfusion phenomena. No postoperative limb ischaemia or stroke was evident. No wound infections or late pseudoaneurysms were observed. CONCLUSIONS: The open Seldinger-guided technique for axillary artery cannulation is safe and effective. We strongly recommend this technique, given its speed and simplicity. The vessel is not snared, thereby preserving distal arterial flow and minimizing the risk of acute limb ischaemia. Furthermore, the limited manipulation of the artery lowers the risk of local complications
Dr. Duane M. Jackson, Morehouse College, July 2011
No full textThis video is a conversation with Dr. Duane M. Jackson. Dr. Jackson talks about his paper, "Recall and the Serial Position Effect: The Role of Primacy and Recency on Accounting Students' Performance." Jackie Daniel, AUC Woodruff Library, is the interviewer
Comparative analysis of methanogenic communities in different laboratory-scale anaerobic digesters
No full text© 2016 Ayrat M. Ziganshin et al.Comparative analysis of methanogenic archaea compositions and dynamics in 11 laboratory-scale continuous stirred tank reactors fed with different agricultural materials (chicken manure, cattle manure, maize straw, maize silage, distillers grains, and Jatropha press cake) was carried out by analysis of the methyl coenzyme-M reductase -subunit (mcrA) gene. Various taxa within Methanomicrobiales, Methanobacteriaceae, Methanosarcinaceae, Methanosaetaceae, and Methanomassiliicoccales were detected in the biogas reactors but in different proportions depending on the substrate type utilized as well as various process parameters. Improved coverage and higher taxonomic resolution of methanogens were obtained compared to a previous 16S rRNA gene based study of the same reactors. Some members of the genus Methanoculleus positively correlated with the relative methane content, whereas opposite correlations were found for Methanobacterium. Specific biogas production was found to be significantly correlating with Methanosarcinaceae. Statistical analysis also disclosed that some members of the genus Methanoculleus positively correlated with the ammonia level, whereas the prevalence of Methanocorpusculum, Methanobacterium, and Methanosaeta was negatively correlated with this parameter. These results suggest that the application of methanogenic archaea adapted to specific feedstock might enhance the anaerobic digestion of such waste materials in full-scale biogas reactors
Comparative analysis of methanogenic communities in different laboratory-scale anaerobic digesters
No full text© 2016 Ayrat M. Ziganshin et al.Comparative analysis of methanogenic archaea compositions and dynamics in 11 laboratory-scale continuous stirred tank reactors fed with different agricultural materials (chicken manure, cattle manure, maize straw, maize silage, distillers grains, and Jatropha press cake) was carried out by analysis of the methyl coenzyme-M reductase -subunit (mcrA) gene. Various taxa within Methanomicrobiales, Methanobacteriaceae, Methanosarcinaceae, Methanosaetaceae, and Methanomassiliicoccales were detected in the biogas reactors but in different proportions depending on the substrate type utilized as well as various process parameters. Improved coverage and higher taxonomic resolution of methanogens were obtained compared to a previous 16S rRNA gene based study of the same reactors. Some members of the genus Methanoculleus positively correlated with the relative methane content, whereas opposite correlations were found for Methanobacterium. Specific biogas production was found to be significantly correlating with Methanosarcinaceae. Statistical analysis also disclosed that some members of the genus Methanoculleus positively correlated with the ammonia level, whereas the prevalence of Methanocorpusculum, Methanobacterium, and Methanosaeta was negatively correlated with this parameter. These results suggest that the application of methanogenic archaea adapted to specific feedstock might enhance the anaerobic digestion of such waste materials in full-scale biogas reactors
Coronary Aneurysm: An Enigma Wrapped in a Mystery
No full textCoronary aneurysms are defined as localized dilatations of the coronary arteries. In this review, we will analyze the most important aspects of this rare condition while trying to provideanswerstothefollowingquestions:Whatisacoronaryaneurysm?Whatcauses coronary aneurysm? Do coronary aneurysms cause symptoms? Can coronary aneur- ysms rupture? How do we treat coronary aneurysms
"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States" By M. Carey.
No full text"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States: containing bried sketches of the moral and political character of those states.
By M. Carey, member of the American philosophical, and of the American Antiquarian Society, and author of The Olive Branch, Cindiciae Hibernicae, essays on banking, on political economy, and on internal improvement.
To which are now added the English editor's comments on the subject; together with Important Advice to Emigrants, and Cautions Against Impositions Practiced in the Outports
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